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  Crop rotations is what time of the year certain crops need to be planted. It reduces soil erosion and increase soil fertility.
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  The spinning Jenny was used fro spinning wool and cotton. The development of the spinning jenny was a main factor in the industrialization of the textile industry.
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  The American Revolution (otherwise known as the war of Independence) was a war between America and Britain. The British were trying to claim parts of America when the French helped America destroy them. The war ended by a vote in parliament after hearing what the Americans and French did to the British.
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  The first fleet was when the British sent convicts to Australia to colonize it.
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  The Newcomen engine was the first machine that was used to produce power.
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  Slavery was ended and all children were freed. It took many years and many riots before the government finally agreed to end slavery/child labor.
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  The federation of Australia was when Australia became it's own nation and the 6 colonies became 6 states/territories of Australia.
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  He was assassinated by some people and after the assassination a bunch of events happened that eventually started WWI.